Gauge



March 24.1925. 1,536,832.

F'. JOHNSTON Film; Sept. 2, 1924 Y Patented yMar. 2,4, 1925.

UNITED `srarls f lssosazj FRANKLIN JOHNSTON, F MOLINE, ILLINOIS.

GAUGE.

` Application filed September` To all whom t may concern.'

B e it knownthat I, FRANKLIN JOHNSTON, a citizen of the'United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Gauges, of Which the following is a specification.

-This invention relates to gauges, and more particularly to 'an apparatus for properly alining the front wheels of aV motor vehicle.

An object of the invention is the provision of a device by means of whichthe cant of the front Wheels and the cambe-r of the axle may be readily determined.

A further-object of the invention is the provision of a simple apparatus by means of which a cant of the front wheel of a motor vehicle may be determined without removing the wheel from the vehicle and the two wheels set at the same angle.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a perspective view of a portion of the front axle showing theinvention applied,

Figure 2 is a horizontal sectional view on line 2-2 of Figure 1, and, j

Figure 3 is a similar view on line 3-3 of Figure 1. l

Referring to the drawings,- the reference numerall designatesone end of the frontA axle of a motor vehicle.. The axle is of the usual construction and is provided with a yoke 2 for the reception ofa spindle bolt 3. The device forming the subject matter of the present invention consists of a vertical supporting rod 4, having a plate 5 secured to the lower end thereof. As shown (see Figure 2), the plate is held in position by means ofV 4a set screw 6. One end of the' plate is provided'wi'th a threaded opening,

adapted to receive a screw 7 and this screw is provided with a point or cone-shaped upper end 8, which 1s adapted to engage the bottom of the spindle bolt. l is further adapted to support a'laterally extending member 9 which iscapable of adjustment toward and away from the plate 5. As shown, this member is provided with a threaded opening ada ted to receive a bolt 10 and the endof the olt enters a key way 11 in the vertical member 4 to retain the lateral'members 5 and 9 in alinement with each other. One end of the member 9 is The rod 4 l 2, 1924. serial No. 735,445.

y provided with a threaded opening for the the rod. The lateral members 5.and 9 extend beyond the 'vertical member 4 and the lower member 5 is provided with a gauge 15, having suitable indicia on its as indicated at 16. A plumb line 17 is attached to the upper member 9 and is provided with a weight 18 on its Llower lend.

In operation, the device is applied to a vehicle in the manner illustrated in Figure 1 of the drawings, without removing the wheel for the purpose of determining the cant of the wheel. tal arms 5 and 9 extend at right angles to the axle. The arm 9 is first adjusted to the length of the spindle bolt and the thumb screw `1Q tightened. Therscrews 7 and 12 are then inserted in the spindle bolt centers and the upper screw or rod 12 turneduntil the device 1s reasonably tight. The gauge 16 is adjusted longitudinally of the arm 5 until the plumb line device is then applied to the other wheel and the wheel adjusted until the linewill touch the gauge when in the same position.

To test the camber, the Ywheel is. removed and the apparatus applied in the same manner as heretofore described, except that it is arranged in alinement with the axle or at drawings'.

outer edge,

As shown, the horizon- 17 touches it and the- It is to vbe understood that the form of v my invention herewith shown and described is to -be taken as a preferred example of the same, and vthat variousv size, and arrangement of parts may be resorted to without departing 4from the spirit of the invention or the scope of the sub- ]'oined claims.

I claim:

1. In a device lof the character described, a supporting rod, an

ower end of said rod, a second arm adjustably mounted on said rod, threaded pins arranged in said arms inalinementwltheach other'and kadapted to engage, respectively, the upper andlower ends of a spindle bolt in the front axle of a Vehicle, and support said rod parallel to said spindle bolt, a plumb line carried by said upper arm, and a gauge mounted on said' lower arm.

2. In a device of the character described,

arm secured to the slot,

lower end vided with a a 'supportin rod,` an arm secured to the lower endo said rod, a second arm adjustably mounted on said arm, threaded pins arranged in said arms in alinement with each other and adapted to engage, respectively, the upper and lower ends et a spindle bolt in the front axle of a vehicle, and support said rod parallel to said spindle bolt, a plumb line carried by said upper arm, a gauge mounted on ysaid lower arm, said gauge being provided with an elongated and a fastening element passing through said slot and' entering said arm to permit adjustment of said gauge.

3. In a device of the character described, a supporting rod, an arm secured to the of said rod2 said rod being prolongitudinally extending keyway adjacent its upper end, an upper arm mounted on said rod, a set screw carried said arm and adapted to'be received insaid key-Way, threaded pins carried by said arms in alinement with each other and adapted to engage, respectively, the upper and lower ends of a lspindle bolt inthe front axle of a vehicle, and support said rod parallel to said spindle bolt, said pins being provided with pointed ends, a plumb line carried by said upper arm, and a gauge carried by said lower arm.

In testimony whereof I alix my signature in presence of two Witnesses.

- FRANKLIN JOHNSTON. Witnesses: i

E. H. H ENs'rRUM, W. E. JACKSON. 

